Double-action sprayer



Feb. `1,1, 1930. l Y E. o. coRs'oN l 1,746,524

' DOUBLE ACTION SPRAYER Filed Aug.v 27, 1928 A IN VEN TOR. fsf/0. @aegon/ Patented Feb. 1I, y.

UNITED -sra'riz-sy PATENT VIlilSIilK O.' COBSON', 0F BERKELEY, CALFORNI, l

noUnLEAcrIoN srnam applicati@ me'an'gusi 27.1928. serial No. oaiss.

`The invention forming the subject matter Y of this application elates to double action pumps, especially a apted to be used in connection 'with sprayers. r

The primary object of the invention is the provi'sion of a double action pinp for`at ltaehment to anycontaine having an opening thereon adapted to receive th pump, and the pump being especially adapted. to be used in connection with drums egenerally employed for transferring chemicals such as in- 'vision of a double Aaction pump which mayT be readily inserted into a container and which is adapted to transfer lilid from the container into t e pump casing or cylinder t the upward stroke of the plunger, and 4to liver ap proximately'half of `the fluid from said cyl finder at the downward stroke off-the plunger and *toi deliver the other half of the Huid from said cylinder at theupward stroke of` the plunger, at.' the same time pumping anav other char e oi liuid from the container into Other `objects of the invention are to provide a device of the character-described that will be superior'in lpoint of simpllcity, in-

expensiveness of construction, plsitiveness of' c nvenlence n1n operation, l and facility and use, and generalelflciency.

drawing, the invention is illustratedl in the form considered to be the best, but lit is to be understood that the invention is not limli'ted to such form because it may be embodied in other forms, and? it is also to be inderstood that in and bythe claims following the decription, it is desired to ,cover thelinvention i in whatsoever 'form it may. be embodied.

` I nthe drawingl Figure 1 isa vertical sectional view of the pump as lattached to a container, showing a also providedlip omer.;

spray nozzle connected to'the outlet opening i of the pump; v

Figure 2 is an enlarged sectional viewlof the lower end of the pump, showin the ar.

rangement of the valve in the end o the cylthe plunger; and

inderfand of the inner valve in the end of f Figure 3 is atop plan View of the pum l l and the container to which the pump 1s at tached.

Referring to the/accompanying drawings, .wherein slnnlar4 reference characters .designate similar parts thruout, the pump in its.

lentirety is denoted by the numeral 46, and a "container is designated by the numeral 7. In

the topof the container 7 is an o ening 8 into which is xedly secured a reindrcing bushing 9, the aperture of said bushing being provided with an internal thread. A vent 11 is the top of the container for the purpose pressureinto the tank.

/ 'lhe 'pump 6 comprises a casing 12 havin a handle portion 13 thereon. Thelower en ofthe casing 12 terminates in a. stem 1 4 .lower end of the stem 14, as at 181 The lower admitting atmospheric air provided with external threads for engageil end of the cylinder is provided with internal threads, as at 1 9, into which is secured a valve body 21 ana erture 22 of which is controlledby a ball c eck valve 23. A pin 24. is transversely disposed across the valve openingu above the ball 23 so 5as 'to prevent the accidental removalL/of the ball. It is tobe noted In this specication, and the annexed? that extensions may be secured'into the lower end of the cylinder and the check valve may be secured infto tlfe free end of the lastaextension, thereby assuring a proper len h for (the .pump so that the's'ame reaches to t e'bot' 'tom oa container.

A plunger 26 is reciprocable in the cylinder 17 and is slidablysuplported in the casin 12. At the upper endof the casing 12 is alpac 'ng box 275 of any suitable construction so as to prevent the yescapeinent ofl iuids y from 4the casing 12. outlet opening..28 on the cas ing 12 is disposed below the packing box 27.

i The handle 13. is made hollow `so as to provide an air chamber thereat. A passage 29 1s rus formed inside of the casingr12 in continuation of the chamber of the cylinder 17. The air chamber inside lof the handle 13 and the outlet opening 28 communicate with the passage 29 around the outside circumference of -the plunger 26. A handle 31 is secured to the thereon for tightly securinga pair of leather cups 37 against the Jend of the plunger 26. The leather cups 37 have` an inside diameter .substantially `correspondingr to the outside .diameter of the tubular plunger 26 andthe outside diameter thereof is slidable in the .above the plug 41 for the chamber of the cylinder 17. When the valve body 34 is tightly screwed into the threaded end of theplunger 26, the leather cups V37 are securely and tightly held in place thereby. In the-valve body 34 is disposed an inner'ball 8 for controlling the aperture of the valve lntheusual manner. Above the valve body 34 are passages 39 connecting the passage of the tubular plunger 26'with the inside chamber of the cylinder 17. The portionA of the tubular plunger containing the' valve 33 and the passages 39 is separated from the rest of the inner chamber of the plunger by means of a suitable plug 41 fixedly secured-inside of the tube above the passages 39. A plurality of apertures 42 is cut thru the walls of the tubular plunger 26 purpose to be hereinafter described. I

. The outlet opening, 28 of the casing 12 is internally threaded and'is adapted to receive a tube 43 having a spray nozzle 44 attached to the f ree .end thereof/ It isto be noted that any suitable conduit, flexible or rigid, leading to any suitable nozzle, may be secured into the threaded opening 28. s

The invention 'operates as follows: The pump is inserted into the bushing 9 so that the lower end of the pump is 'adjacent to the bottom of the container 7. The-pump 6 and the container 7 are now held by the handle 13 in one hand, while the other hand operates the plunger 26 by exerting the required pull on the handle 31.

The first stroke of the plunger 26 is an upward stroke. The plunger is pulled upwardly until the leather cup37 abuts against the casing 12 at about lthe lower edge of the outlet opening 28. It is to be noted that the hole thru the casing 12 is reduced at the upper end above the passage 46 vconnecting the chaml be noted that the capacity of the cylinder 17 .is approximately twice the volume of the portion of the plunger 2 extended into the cylinder 17 at the end of its downward stroke. Thus, when the handle 31 is pressed downwardly,.and the plunger 26 is moved thereby, the ressure exerted on the fluid in the cylinf der 17 will firmly close the check Valve 23, and at the same time will cause the opening of the check valve 33. Now, during the downward stroke of the plunger 26, the fluid, having no other outlet, will flow into the lower part of the tubular plunger 26 and thru the apertures 39 into the concentric space between the plunger 26 and the cylinder 17. As it was heretofore stated, when the plunger 26 is at the end of its down stroke, it occupies one-half of the total capacity of the cylinder 17`and the casing passage 29, so .that when the fluid is forced into the concentric-space outside of the plunger, there is only sufficient space to hold one-halfof the volume of the fluid forced thru the valve 33 by the downward stroke of the plunger 26. Therefore, the other half of the fluid forced thru said check valve will be delivered under pressure thru the outlet opening 28 thru the tube 43 and nozzle 44, thereby spraying the fluid thru said nozzle. The chamber of the handlel 13 and the chamber provided above the opening 42 inside of the tubular plunger 26 function as the air chambers of the double acting pump, 4so as to still further assistin effecting' a continuous flow thru the outlet opening 28 thru the nozzle 44.

During the next upward stroke of the plunger 26, the pressure of the fluid closes the valve 33, andthe. leather cup 37 forces the remaining fluid from the concentric" space be- "tween the plunger 26 and the cylinder 17 out thru the outlet,.opening 28. At the same time, the ysuction created by the upward4 stroke of the piston 26 will draw in another charge of fluid from the container 7 into the cylinder 17 in the manner heretofore described.

It will be recognized that a continuous flow is readily effected by the use of the pump heretofore described because while a full charge is drawn into the cylinder 17 at every upward stroke of the piston 26, at the same time, the 'remaining half of the fluid around the plunger is delivered thru thenozzle 44; and

` during the next downward stroke of the piston 26, while the whole content of the cylinder 17 Yis forced thru the valve 33, one-half of this fluid is immediately forced out thru the outlet opening 28 and nozzle .44, the other half remaining in vthe "concentric space around the plunger 26 and being delivered .from -the pump during the next upward stroke of the piston 26. v

lt will also be recognized that the pump fmay be secured in containers of any size by providing `the respective container with an` opening adapted, to receive the threaded portion of the casing 12, or by providing bushings or nipples on the' threaded portion of the casing'l2 so as .to make the same it an -larger openings in the top of a container. lso extensions may be provided at the lower end of lower valve body 21 from the cylinder 17.

Then by advancing the plunger 26 to the fulllength thereof thru'the cylinder 17,'the inner valve 33 protrudes outside of the lower'end of the cylinder, 17, thereby allowing the re-v` pairor the cleaning thereof.

closed at its outer end and provided with a valve at its lower end, the plunger being closed at its outer end and provided with a i valve at its lower end, the apertures through the Wall of the' plunger being intermediate the valve and the plug, a sprayer, and communicating meansbetween the sprayer and the interior of the nipple.

ln testimony whereof I altlx` my signature.

ESEK O; CORSON.

From the foregoing, it is thought that the I construction, use, and many advantages of the hereindescribed sprayer pump will bel adequately understood. ltwill be further understood that certain material alterations in the construction may be effected withouthaving a deleterious effect on the efficiency of my device. The minor details in the construction will at all times, of course, be performed Within the scope and spirit of the subjoined claims.

l claim:

` l. A sprayer comprising a container ha'vpg ed 'an air inlet vent therein, a centrally bo nipple in screw-threadedY engagement"with one end of the container and extending .tothe approximate bottoni thereof, a 'tubular plunger having apertures through its walls and concentric within'the nipple, the nipple being closed at its outer v'end and provided with a valve in its lower end9 the plunger being closed at its'outr end and provided with a valve at its lowerend, a plug within the plunger and intermediate the apertures through the wall of the plunger, a hollow handle formed on the nipple in communication with said nippleand spaced from vvthe container, a sprayer and communicating means betweenthe/sprayer and the interior of the nipple. u Y' 2. A sprayer comprising a container liawr ing an air inlet vent thereimga centrally bored 'nipple in screw-threaded engagement withv vica l il@ one'end ci ythe container and extendingto;the'l approximate bottom thereof, f ai@ tubi);lair v' y plunger having apertures therein through itsl- Y walls and being -placed concentric within the nipple, a plug within the hollowtubular plunger, the said hollow tubular plunger extending above said'plug, the nipple being 

